76 HYDROPHILIDA. 
4. Helochares seriatus, 
Breviter ovalis, parum convexus, pernitidus, lividus; antennarum basi, palpis pedibusque testaceis ; capite 
thoraceque subtiliter punctatis; elytris nullomodo striatis, seriebus decem regularibus punctorum im- 
pressorum conspicuis. 
1 1] 
Long. 23, lat. 14 lin. 
Hab. Guaremata, Guatemala city 5000 feet, Pantaleon 1700 feet, Coatepeque 
1300 feet, Rio Naranjo 480 feet, San Gerénimo (Champion). 
This species is remarkable from the ten very regular series of punctures on each 
wing-case, these series not being placed in depressed striz as is the case in other 
punctate-striate species of the genus. The palpi are moderately long, the eyes small ; 
the mentum is very closely and coarsely rugose-punctate, the submental area not limited 
behind by a definite line, but glabrous and shining and with coarse punctures. The 
prosternum is very obscurely carinate along the middle, and the mesosternum longitu- 
dinally prominent along the middle. 
5. Helochares regularis. 
Breviter ovalis, parum convexus, pernitidus, lividus ; antennarum basi, palpis tarsisque testaceis ; capite crebrius 
sat fortiter punctato; thorace minus crebre subtiliter punctato; elytris substriatis, striis fortiter punc- 
tatis. 
Long. 23, lat. 17 lin. 
Hab. Mexico. 
Closely allied to H. seriatus in all points except the sculpture of the upper surface, 
which is here much coarser, the punctate strize of the elytra being especially much 
more developed. 
The only individual I have seen is from an old F rench collection; but I have no 
. doubt the locality is correct. 
6. Helochares bipunctatus. 
Ovalis, subdepressus, nitidus, sordide ferrugineus ; antennarum basi, palpis pedibusque testaceis ; capite thorace- 
que crebrius sat fortiter punctatis, hoc basi utrinque puncto majore conspicuo impresso ; elytris profunde 
striatis, striis latis etiam ad apicem impressis, fortiter punctatis. 
Long. 23, lat. 13 lin. 
Hab. Mexico, Cordova (Sallé); Guatemana, Torola, 1000 feet (Champion). 
Distinguished from H. seriatus and H. regularis by the deep broad striz on the wing- 
cases, each stria being filled with punctures separated from one another by extremely 
small intervals; this same character separates the species from the North-American 
H. maculicollis, Melsh. The larger puncture near the base of the thorax on each side 
exists also in H. maculicollis and in H. regularis, but in the latter species is less 
conspicuous than it is in H. bipunctatus. 
Only a single individual from each of the two localities. 
